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Re: [Xen-devel] [PATCH] evtchn: make support for different ABIs tunable


On 07/08/2019 15:35, Jan Beulich wrote:
On 07.08.2019 13:20, Eslam Elnikety wrote:
 >> --- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -338,6 +338,7 @@ struct domain
     struct evtchn  **evtchn_group[NR_EVTCHN_GROUPS]; /* all other buckets */
     unsigned int     max_evtchns;     /* number supported by ABI */
     unsigned int     max_evtchn_port; /* max permitted port number */
+    bool             disable_evtchn_fifo;            /* force 2l ABI */
     unsigned int     valid_evtchns;   /* number of allocated event channels */
     spinlock_t       event_lock;
     const struct evtchn_port_ops *evtchn_port_ops;

I suppose you can find a better place to put this 1-byte field
than between two 32-bit ones, leaving a 3-byte hole.

Or just remove the field because the same value is already stored in 


Julien Grall

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